1. ANL-FNAL Collaboration Meeting: Superconducting RF ANL: Mike Kelly, Scott Gerbick, Bill Boettinger (NE) FNAL Collaborators: Kerry Ewald, Cristian Boffo, Dan Olis, Allan Rowe Speaker: Mike Kelly May 18, 2007

2. 2 ANL SRF Group M. Kelly, J. Fuerst, S.Gerbick Z. Conway (Grad. Student) K. Shepard (1 day/week) Coordination Nb procurement, QA Mechanical & EM design Chemistry Clean processing & assembly Testing AES Sciaky Niobium tooling and forming Electron beam welding ANL Shops Meyer Tool Brazing Stainless machining ILC AEBL ERL 203 Cold Test Facility 203 Surface Prep Lab SCSPF HINS SRF Accelerator Projects ANL SRF Facilities Manpower Projects in Superconducting RF (ANL perspective) Collaborators K. Ewald, A. Rowe, D. Olis ATLAS

3. 3 SRF at ANL Effort for ILC FY07 ANL interest is to develop the complete capability for building, processing, testing, operating elliptical cavities

4. 4 Major Areas of ANL/FNAL SRF Collaboration Cavity Processing Infrastructure (2002-07) Chemistry/Clean rooms Scrubber Ultra-pure water system High-pressure water pump Electropolishing System, 12 design meetings since Oct. 06 Cathode/Cathode Loading – FNAL lead Cavity mechanical assembly – ANL lead High-pressure water rinsing/single cavity clean assembly “G150” Surface Prep Laboratory at ANL 3.9 GHz Cavity Buffered Chemical Polishing

5. 5 ILC-Americas Planning: ANL/FNAL to Lead Cavity Processing

6. 6 Technical Approach: A Horizontal Electropolishing System

7. 7 Technical Approach: Cathode Loading, Acid Draining, Water Rinsing

8. 8 Electropolishing Design Review at ANL, Feb. 12 2007 Reviewers: Hasan Padamsee (Cornell), Kenji Saito (KEK), Tsuyoshi Tajima (LANL), Lutz Lilje (DESY), Axel Matheisen (by phone DESY), Marc Ross (FNAL), John Mammosser (JLAB) Presenters: Mike Kelly (ANL), Cristian Boffo (FNAL) Does the design meet the ILC specifications? Will the system be ready for commissioning in July 2007? Assess the suitability of the design for performing one EP procedure per week in FY08-09. Charge to the Committee The committee report was very positive; manpower critical path

9. 9 SCSPF: Superconducting Cavity Surface Processing Facility Location: Argonne Building 208 Facility Cost with manpower $2M Safety Review Completed in 2006; 700 man-hours and $100K EP Operations started in 2006 20 m

10. 10 SCSPF: ANL Portion

11. 11 Commissioning the SCSPF: Electropolishing Last of 6 QWR for ATLAS Upgrade, May 07 Entry into ANL chemistry room after EP

12. 12 Assembling/Testing Hardware for ILC Cavity Processing Electropolishing system mechanical frame Cavity handling system for chemistry & clean rooms

13. 13 Status of ANL-FNAL collaboration in SRF ANL-FNAL have had an effective collaboration on electropolishing EP Design Specification 100% complete EP Engineering Design 100% complete EP Design Review 90% complete EP System/component procurement 90% complete EP system assembly 40% complete We are on track to perform electropolishing for ILC by July 2007 ANL-FNAL collaborating on high-pressure rinsing for the joint facility; began in April on design/construction (initially de-scoped due to CR in FY07) Continued effective ANL-FNAL SRF effort require a (more) focused and sustained effort of a (larger) group of technical together with management.

14. 14 Additional Material: A Cavity Holding Fixture Spider Assembly 2.5 cm stainless (titanium) tube clamps here using aluminum “seat” clamp Pin with expanding diameter “quick” pin

15. 15 Additional Material: HPR in G150 facility Supplied with 18 M  -cm deionized water at 20 l/m, up to 3000 PSI Rinsed and dried in a curtained clean area

16. 16 Additional Material: Test of End Group Fri. Feb 9, 2007 Filled with water, rotated shaft on lip seal at 20 rpm, pressurized to 2 PSI First test looks good; long term operation to be tested

17. 17 Additional Material Fluoride specific electrode; untested; requires dilution by ~50X